Very interesting postapulcino.
I presume you have seen shademaster's Poser 4 renderupgrade in freestuff which simulates HDRI using one supplied image.
Your app looks like it maps the light sphere to a rectangular map allowing colour gradiation on the map and corresponding lights.
Can you integrate the colour picker tool with this? Can the rectangular map take imported bitmaps/jpegs etc.?
If I can make one further comment, that is an awfull lot of lights in that array. Render time must be very high. Do you plan the app to use a standard array size e.g. 80 lights or will this be variable?
Otherwise this looks very good.

Regards
STORM